Syndiotactic styrenic resin composition

ABSTRACT

Disclosed is a syndiotactic, polystyrenic resin composition comprising (A) 100 parts by weight of a component composed of (a) from 10 to 98% by weight of a styrene-based polymer having a syndiotactic configuration and (b) from 2 to 90% by weight of a polyolefin, (B) from 0.5 to 50 parts by weight of a block or graft styrene-olefin copolymer having a styrene content of from 40 to 85% by weight; the composition can be formed into articles having good heat resistance, a high modulus of elasticity and good toughness. In addition, the articles are advantageous in that their surface layers are hardly peeled.

FIELD OF THE INVENTION

The present invention relates to a syndiotactic, polystyrenic resin composition. More precisely, it relates to a syndiotactic, polystyrenic resin composition which can be formed into an article having improved heat resistance, an increased modulus of elasticity and greatly improved toughness, and in addition, the peeling of the surface layer of the article to be formed from the composition is retarded.

BACKGROUND OF THE INVENTION

Articles formed from a styrene-based polymer having a syndiotactic configuration (hereinafter referred to as SPS) have excellent heat resistance and chemical resistance but have poor impact resistance. Therefore, the polymer has heretofore been used in limited ranges. In order to improve the impact resistance of SPS articles, it has been proposed to add rubber-like elastic substances and other thermoplastic resins to SPS (see Japanese Patent Application Laid-Open Nos. 257950/1987, 146944/1989, 182344/1989, 279944/1989, and 64140/1990).

Concretely, a composition comprising SPS and, as a rubber-like elastic material, a component containing a styrenic compound (see Japanese Patent Application Laid-Open No. 146944/1989), and a composition comprising a mixture of SPS and a thermoplastic resin and/or a rubber-like polymer except SPS, and, as a miscibility-improving agent, a styrenic chain-containing, block or graft copolymer (see Japanese Patent Application Laid-Open No. 279944/1989) have been proposed.

These compositions contain, as a miscibility-improving agent, a polystyrenic chain-containing, block or graft polymer, in order to improve the miscibility of a rubber component with immiscible SPS and to improve the dispersibility of the rubber component and the interfacial strength between the constitutive components. However, the effect of the miscibility-improving agent therein is not satisfactory. Therefore, the articles formed from these compositions are not satisfactorily tough and the peeling of the surface layers from the articles could not be retarded sufficiently.

SUMMARY OF THE INVENTION

Given the situations, it is an object of the present invention to provide a syndiotactic, polystyrenic resin composition which can be formed into an article having an increased modulus of elasticity, high heat resistance and greatly improved toughness, and additionally having high impact resistance while retarding the peeling of the surface layer from the article.

We, the inventors of the present invention have assiduously studied so as to develop a syndiotactic, polystyrenic resin composition having the above-mentioned favorable properties and, as a result, have found that the intended object can be attained by a composition comprising a styrene-based polymer having a syndiotactic configuration and a polyolefin and, as a miscibility-improving agent for these, a particular styrene-olefin copolymer, in predetermined ratios. In addition, we have found that, when a small amount of a polyphenylene ether is added to the composition, the toughness of an article to be formed from the resulting composition can be more effectively improved. Moreover, we have further found that, when a particular styrene-based copolymer and/or a particular oil or wax are/is added thereto, the toughness of the article can be much more effectively improved. Furthermore, we have found that, when an inorganic filler, or a combination of an inorganic filler and a particular polymer having a polar group is added to the composition in predetermined ratios, the heat resistance and the modulus of elasticity of the article can be much more increased. On the basis of these findings, we have completed the present invention.

Specifically, the present invention provides;

(1) a syndiotactic, polystyrenic resin composition comprising resin components of (A) 100 parts by weight of a component composed of (a) from 10 to 98% by weight of a styrene-based polymer having a syndiotactic configuration and (b) from 2 to 90% by weight of a polyolefin, and (B) from 0.5 to 50 parts by weight of a styrene-olefin copolymer having a styrene content of from 40 to 85% by weight;

(2) a syndiotactic, polystyrenic resin composition comprising resin components of (A) 100 parts by weight of a component composed of (a) from 10 to 98% by weight of a styrene-based polymer having a syndiotactic configuration and (b) from 2 to 90% by weight of a polyolefin, (B) from 0.5 to 50 parts by weight of a styrene-olefin copolymer having a styrene content of from 40 to 85% by weight, and (C) from 0.5 to 10.0 parts by weight, relative to 100 parts by weight of the component (a) of (A), of a polyphenylene ether (having an intrinsic viscosity in chloroform at 25° C. of 0.4 dl/g or higher);

(3) a syndiotactic, polystyrenic resin composition of the above-mentioned (1) or (2), which further contains (D) from 0 to 200 parts by weight, relative to 100 parts by weight of the component (b) of (A), of a styrene-olefin copolymer having a styrene content of from 5 to 35% by weight;

(4) a syndiotactic, polystyrenic resin composition of the above-mentioned (1) or (2), which further contains (E) from 0 to 200 parts by weight, relative to 100 parts by weight of the component (b) of (A), of a paraffinic oil, a paraffinic wax, a mineral oil and/or a siloxanic oil; and

(5) a syndiotactic, polystyrenic resin composition of the above-mentioned (1) or (2), which further contains (D) from 0 to 200 parts by weight, relative to 100 parts by weight of the component (b) of (A), of a styrene-olefin copolymer having a styrene content of from 5 to 35% by weight, and (E) from 0 to 200 parts by weight, relative to 100 parts by weight of the component (b) of (A), of a paraffinic oil, a paraffinic wax, a mineral oil and/or a siloxanic oil.

Preferred embodiments of the present invention are;

(6) the syndiotactic, polystyrenic resin composition of any of the above-mentioned (1) to (5), which further contains (F) from 0.5 to 350 parts by weight, relative to 100 parts by weight of the resin components, of an inorganic filler, and

(7) the syndiotactic, polystyrenic resin composition of any of the above-mentioned (1) to (5), which further contains (F) from 0.5 to 350 parts by weight, relative to 100 parts by weight of the resin components, of an inorganic filler, and (G) from 0.1 to 10 parts by weight, relative to the same, of a polymer which is miscible with or has an affinity for the component (a) of (A) and which has a polar group.

DETAILED DESCRIPTION OF THE INVENTION

The resin composition of the present invention comprises, as the component (a) of (A), a styrene-based polymer having a syndiotactic configuration. The syndiotactic configuration in the styrene-based polymer as referred to herein indicates that the stereochemical structure of the polymer is syndiotactic or, that is, such that the phenyl groups or substituted phenyl groups which are in the side chains of the polymer are located alternately in opposite directions relative to the main chain of the polymer that consists of carbon-carbon bonds. The tacticity of the polymer is quantitatively determined through nuclear magnetic resonance thereof using a carbon isotope (¹³ C-NMR). The tacticity as determined through ¹³ C-NMR can be represented by the proportions of the structural units as continuously connected to each other, for example, in terms of diad for two structural units, triad for three structural units and pentad for five structural units. The styrene-based polymer having a syndiotactic configuration as referred to herein includes, for example, polystyrene, poly(alkylstyrene), poly(halogenostyrene), poly(halogenoalkylstyrene), poly(alkoxystyrene), poly(vinyl benzoate), hydrogenated polymers of these, mixtures of these, and copolymers consisting essentially of these, which have generally 75% or more, preferably 85% or more of syndiotacticity of racemic diad, or have generally 30% or more, preferably 50% or more of syndiotacticity of racemic pentad. The poly(alkylstyrene) includes, for example, poly(methylstyrene), poly(ethylstyrene), poly(isopropylstyrene), poly(tert-butylstyrene), poly(phenylstyrene), poly(vinylnaphthalene), and poly(vinylstyrene). The poly(halogenostyrene) includes, for example, poly(chlorostyrene), poly(bromostyrene), and poly(fluorostyrene). The poly(halogenoalkylstyrene) includes, for example, poly(chloromethylstyrene). The poly(alkoxystyrene) includes, for example, poly(methoxystyrene), and poly(ethoxystyrene).

Of these styrene-based polymers, especially preferred are polystyrene, poly(p-methylstyrene), poly(m-methylstyrene), poly(p-tert-butylstyrene), poly(p-chlorostyrene), poly(m-chlorostyrene), poly(p-fluorostyrene), hydrogenated polystyrene, and copolymers comprising structural units of these.

The molecular weight of the styrene-based polymer for use in the present invention is not specifically defined. Preferably, however, the polymer has a weight average molecular weight of 10,000 or more, more preferably 50,000 or more. The molecular weight distribution of the polymers is not also defined. Various polymers having different molecular weights can be applied to the present invention. However, polymers having a weight average molecular weight of less than 10,000 are undesirable, since the thermal and mechanical properties of the composition, if comprising any of such polymers, and those of the articles to be formed from the composition often tend to be poor.

The styrene-based polymer having a syndiotactic configuration for use in the present invention can be obtained, for example, by polymerizing a styrenic monomer (capable of giving any of the above-mentioned styrene-based polymers) in the presence of a catalyst composed of titanium compound and a condensate to be produced from water and a trialkyl aluminium, in an inert hydrocarbon solvent or in the absence of such a solvent (see Japanese Patent Application Laid-Open No. 187708/1987). Poly(halogenoalkylstyrene)s capable of being employed in the present invention can be obtained, for example, according to the method described in Japanese Patent Application Laid-Open No. 46912/89; and hydrogenated polymers for use in the invention can be obtained, for example, according to the method described in Japanese Patent Application Laid-Open No. 178505/89.

The styrene-based polymers having a syndiotactic configuration, which shall constitute the component (a) of (A) in the composition of the present invention, can be used either singly or as combined.

The component (b) of (A) in the composition of the invention is a polyolefin, which may comprise monomer units to be derived from any of olefins and dienes such as ethylene, propylene, butylene, butene, octene, butadiene, isoprene, norbornene, norbornadiene, and cyclopentadiene. It includes any known polyolefins. Specific examples of the polyolefin are ethylene-propylene copolymer rubber (EPM), ethylene-propylene-diene copolymer rubber (EPDM), isotactic polypropylene, syndiotactic polypropylene, atactic polypropylene, block polypropylene, random polypropylene, high-density polyethylene, high-pressure-process, low-density polyethylene, linear, low-density polyethylene, cyclic polyolefins, and copolymers to be obtained from two or more monomers constituting these polymers. Of these, preferred are EPM, EPDM, polypropylene and polyethylene.

The polyolefins that shall constitute the component (b) can be used either singly or as combined.

In the composition of the present invention, the component (A) comprises from 10 to 98% by weight, preferably from 20 to 95% by weight, more preferably from 30 to 90% by weight of the above-mentioned component (a), and from 2 to 90% by weight, preferably from 5 to 80% by weight, more preferably from 10 to 70% by weight of the above-mentioned component (b). If the amount of the component (a) of (A) is less than the above-mentioned range, the composition will lose the characteristics of the syndiotactic polystyrene, and the modulus of elasticity and the heat resistance of the article to be formed from the composition will be noticeably lowered. If, on the other hand, it is more than the range, the toughness of the article could not be satisfactorily improved.

The composition of the present invention comprises from 0.5 to 50 parts by weight, relative to 100 parts by weight of the component (A), of the component (B) which is a styrene-olefin copolymer having a styrene content of from 40 to 85% by weight. The component (B) acts as a miscibility-improving agent for the components (a) and (b) that constitute the component (A). The block copolymer of the component (B) must have a styrene content of from 40 to 85% by weight. Preferably, the copolymer has a melt viscosity of 1200 Pa.sec or less at a temperature of 300° C. and at a shearing rate of 100 sec⁻¹.

If the styrene content of the copolymer is outside the defined range, the copolymer of the component (B) could not sufficiently function as a miscibility-improving agent for the components (a) and (b). If so, the toughness of the article to be formed from the composition is low, the peeling of the surface layer from the article could not be satisfactorily retarded, and therefore the objects of the present invention could not be attained satisfactorily. In view of its miscibility-improving function, the styrene content of the copolymer of the component (B) is preferably from 45 to 80% by weight, more preferably from 50 to 75% by weight. If, on the other hand, the melt viscosity of the copolymer (this is a parameter of the molecular weight of the copolymer) is more than 1200 Pa.sec, the copolymer could not sufficiently function as a miscibility-improving agent for the components (a) and (b) and, as a result, the objects of the present invention could not be attained.

The styrene-olefin copolymer of the component (B) includes, for example, styrene-butadiene random copolymer, hydrogenated styrene-butadiene random copolymer, styrene-isoprene random copolymer, hydrogenated styrene-isoprene random copolymer, styrene-butadiene block copolymer (SBR), hydrogenated styrene-butadiene block copolymer (SEB, SEBC), styrene-butadiene-styrene block copolymer (SBS), hydrogenated styrene-butadiene-styrene block copolymer (SEBS), styrene-isoprene block copolymer (SIR), hydrogenated styrene-isoprene block copolymer (SEP), styrene-isoprene-styrene block copolymer (SIS), hydrogenated styrene-isoprene-styrene block copolymer (SEPS), styrene-ethylene copolymer, styrene-propylene copolymer, ethylene-styrene graft copolymer, propylene-styrene graft copolymer, EPM-styrene graft copolymer, EPDM-styrene graft copolymer, and their modificates. Of these, preferred are styrene-olefin diblock copolymers and styrene-olefin triblock copolymers, which include, for example, styrene-butadiene block copolymer (SEB, SEBC), styrene-butadiene-styrene block copolymer (SBS), hydrogenated styrene-butadiene-styrene block copolymer (SEBS), styrene-isoprene block copolymer (SIR), hydrogenated styrene-isoprene block copolymer (SEP), styrene-isoprene-styrene block copolymer (SIS), hydrogenated styrene-isoprene-styrene block copolymer (SEPS) and their modificates.

The olefin moiety of the component (B) is preferably compatible with the component (b) of (A). The component (B) may comprise one or more such styrene-olefin copolymers.

The composition of the present invention shall comprise from 0.5 to 50 parts by weight, relative to 100 parts by weight of the component (A), of the component (B). If the content of the component (B) is less than 0.5 parts by weight, the miscibility-improving effect of the component (B) is insufficient. If so, therefore, the toughness of the article to be formed from the composition could not be improved satisfactorily and the peeling of the surface layer from the article could not be sufficiently retarded. However, even if the content is more than 50 parts by weight, any more improvement in the toughness of the article and in the retardation of the peeling of the surface layer from the article could not be expected. Therefore, if too much amount of the component (B) over the defined range is added to the composition of the invention, such is unfavorable since the cost of the composition is increased. In view of the toughness and other properties of the article to be formed from the composition and of the intended object of retarding the peeling of the surface layer from the article, the content of the component (B) is preferably from 1 to 40 parts by weight, more preferably from 3 to 30 parts by weight.

If desired, the resin composition of the present invention may optionally contain, as the third component (C), a polyphenylene ether. Polyphenylene ethers are known, for which, for example, referred to are U.S. Pat. Nos. 3,306,874, 3,306,875, 3,257,357 and 3,257,358. Concretely, homopolymers or copolymers of polyphenylene ethers for use in the present invention can be produced from one or more phenolic compounds as substituted at two or three positions thereof, through oxidative coupling in the presence of a copper-amine complex. The copper-amine complex to be used may be derived from primary, secondary and tertiary amines. Suitable examples of polyphenylene ethers for use in the present invention include poly(2,3-dimethyl-6-ethyl-1,4-phenylene ether); poly(2-methyl-6-chloromethyl-1,4-phenylene ether); poly(2-methyl-6-hydroxyethyl-1,4-phenylene ether); poly(2-methyl-6-n-butyl-1,4-phenylene ether); poly(2-ethyl-6-isopropyl-1,4-phenylene ether); poly(2-ethyl-6-n-propyl-1,4-phenylene ether); poly(2,3,6-trimethyl-1,4-phenylene ether); poly 2-(4'-methylphenyl)-1,4-phenylene ether!; poly(2-bromo-6-phenyl-1,4-phenylene ether); poly(2-methyl-6-phenyl-1,4-phenylene ether); poly(2-phenyl-1,4-phenylene ether); poly(2-chloro-1,4-phenylene ether); poly(2-methyl-1,4-phenylene ether); poly(2-chloro-6-ethyl-1,4-phenylene ether); poly(2-chloro-6-bromo-1,4-phenylene ether); poly(2,6-di-n-propyl-1,4-phenylene ether); poly(2-methyl-6-isopropyl-1,4-phenylene ether); poly(2-chloro-6-methyl-1,4-phenylene ether); poly(2-methyl-6-ethyl-1,4-phenylene ether); poly(2,6-dibromo-1,4-phenylene ether); poly(2,6-dichloro-1,4-phenylene ether); poly(2,6-diethyl-1,4-phenylene ether); and poly(2,6-dimethyl-1,4-phenylene ether). In addition to these homopolymers, also employable are copolymers to be derived from two or more phenolic compounds such as those to be used in producing the homopolymers. Moreover, also employable are graft copolymers and block copolymers composed of aromatic vinyl compounds such as polystyrene, and polyphenylene ethers such as those mentioned above. Of those, especially preferred is poly(2,6-dimethyl-1,4-phenylene ether).

In view of its effect of improving the impact resistance of the article to be formed from the composition of the invention, it is desirable that the polyphenylene ether of the component (C) has an intrinsic viscosity of 0.4 dl/g or more, preferably 0.5 dl/g or more, as measured in chloroform at 25° C. The content of the component (C) in the composition of the invention shall be from 0.5 to 10 parts by weight, relative to 100 parts by weight of the component (a) of (A). If the content is less than 0.5 parts by weight, the impact strength of the article to be formed from the composition could not be improved satisfactorily. However, if it is more than 10 parts by weight, the shapability or moldability of the composition will be worsened. Preferably, the content of the component (C) is from 1.0 to 5.0 parts by weight relative to 100 parts by weight of the component (a) of (A).

In order to further improve the toughness of the article to be formed from the resin composition of the invention, the composition may contain, if desired, a fourth component (D) of a styrene-olefin copolymer having a styrene content of from 5 to 35% by weight. The component (D) must be a styrene-olefin copolymer having high miscibility with or a strong affinity for the component (b) of (A). Therefore, the styrene content of the copolymer must be from 5 to 35% by weight. If its styrene content does not fall within the defined range, the copolymer would not be effective in improving the toughness of the article to be formed from the composition of the invention.

The styrene-olefin copolymer for the component (D) differs from that for the component (B) only in the styrene content. Therefore, for the copolymers for the component (D), those for the component (B) shall be referred to except for the styrene content. Of these, preferred for the component (D) are styrene-olefin diblock copolymers and styrene-olefin triblock copolymers. Concretely, preferred examples of the copolymers for the component (D) include styrene-butadiene block copolymer (SBR), hydrogenated styrene-butadiene block copolymer (SEB, SEBC), styrene-butadiene-styrene block copolymer (SBS), hydrogenated styrene-butadiene-styrene block copolymer (SEBS), styrene-isoprene block copolymer (SIR), hydrogenated styrene-isoprene block copolymer (SEP), styrene-isoprene-styrene block copolymer (SIS), hydrogenated styrene-isoprene-styrene block copolymer (SEPS), and their modificates.

The component (D) may comprise one or more such copolymers, either singly or as combined.

The composition of the present invention may comprise from 0 to 200 parts by weight, relative to 100 parts by weight of the component (b) of (A), of the component (D). Even if the content of the component (D) is more than 200 parts by weight, the toughness of the article to be formed from the composition could not be improved so much. Therefore, the addition of such a large amount of the component (D) to the composition is unfavorable in view of the cost of the composition. Preferably, the content of the component (D) in the composition is from 1 to 150 parts by weight, more preferably from 5 to 150 parts by weight.

In order to improve the fluidity of the resin composition of the invention and the toughness of the article to be formed from the composition, still another component (E) of a paraffinic oil, a paraffinic wax, a mineral oil or a siloxanic oil may be added to the composition, if desired. The component (E) must be highly miscible with or have a strong affinity for the component (b) of (A). If not, the toughness of the article to be formed from the composition of the invention could not be improved.

The component (E) of a paraffinic oil, a paraffinic wax, a mineral oil or a siloxanic oil includes, for example, polyethylenic oligomers, polyethylenic waxes, polyolefinic oligomers, polyolefinic waxes, heavy cycloparaffins, mineral oils, fatty acid esters, esters of aliphatic, dibasic acids, phthalates, aromatic carboxylates, phosphates, polydimethylsiloxanes, dimethylsiloxane-diphenylsiloxane copolymers, and polymethylphenylsiloxanes. Of these, preferred are polyethylenic oligomers, polyethylenic waxes, mineral oils, polydimethylsiloxanes, dimethylsiloxane-diphenylsiloxane copolymers, and polymethylphenylsiloxanes.

The component (E) may comprise one or more such compounds, either singly or as combined.

The composition of the present invention may comprise from 0 to 200 parts by weight, relative to 100 parts by weight of the component (b) of (A), of the component (E). Even if the content of the component (E) is more than 200 parts by weight, any further effect of the component (E) of improving the toughness of the article to be formed from the composition could not be expected, but rather the modulus of elasticity of the article would be unfavorably lowered. Preferably, the content of the component (E) is from 1 to 150 parts by weight, more preferably from 5 to 100 parts by weight.

If desired, the composition of the present invention may comprise both the component (D) and the component (E). The combination of the component (D) and the component (E) is preferred to the single use of either the component (D) or the component (E), since the former produces higher improvement in the toughness of the article to be formed from the composition of the invention. If desired, the component (D) and/or the component (E) may be previously mixed with the component (b) of (A).

In order to much more increase the modulus of elasticity and the heat resistance of the article to be formed from the resin composition of the invention, it is advantageous to incorporate still another component (F) of an inorganic filler into the composition. Various forms of inorganic fillers can be employed herein, including, for example, fibrous, granular and powdery ones. Fibrous fillers include, for example, glass fibers, carbon fibers and whiskers. The form or shape of the fibrous filler includes, for example, clothes, mats, bound and cut fibers, short fibers, filaments and whiskers. The bound and cut fibers preferably have a length of from 0.05 to 50 mm and a diameter of from 5 to 20 μm.

Examples of granular or powdery fillers include talc, carbon black, graphite, titanium dioxide, silica, mica, calcium carbonate, calcium sulfate, barium carbonate, magnesium carbonate, magnesium sulfate, barium sulfate, hydroxysulfates, tin hydroxide, alumina, kaolin, silicon carbide, metal powders, glass powder, glass flakes, and glass beads. Of these, preferred are glass fillers, such as glass powder, glass flakes, glass beads, glass filaments, glass fibers, glass rovings, and glass mats.

It is desirable that the inorganic filler is surface-treated. For the surface treatment, used is a coupling agent, by which the adhesiveness of the filler to resins is improved. The coupling agent can be selected from any known silane coupling agents, titanium coupling agents and others. Above all, especially preferably used are aminosilanes and epoxysilanes such as γ-aminopropyltrimethoxysilane, N-β-(aminoethyl) -γ-aminopropyltrimethoxysilane, γ-glycidoxypropyltrimethoxysilane, and β-(3,4-epoxycyclohexyl)ethyltrimethoxysilane; and also isopropyl tri(N-amidoethyl, aminoethyl)titanate.

The means of surface-treating the filler with any of such coupling agents is not specifically defined, and any known methods can be employed for the surface treatment. For example, employable are a sizing method where a solution or suspension of a coupling agent is applied to a filler as a so-called sizing agent, and also a dry-mixing method, a spraying method, an integral-blending method and a dry-concentrating method where a Henschel mixer, a super mixer, a V-shaped mixer or the like is used. Any of these methods may be selected, depending on the shape of the filler to be surface-treated. Of these, preferably employed are a sizing method, a dry-mixing method and a spraying method.

The coupling agent can be combined with a film-forming substance for glass. The film-forming substance to be combined is not specifically defined but includes, for example, polyester-type, polyether-type, urethane-type, epoxy-type, acryl-type and vinyl acetate-type polymers.

One or more inorganic fillers can be used for the component (F), either singly or as combined. The content of the component (F) to be in the composition of the present invention shall be from 0.5 to 350 parts by weight relative to 100 parts by weight of 1 the resin component comprising the component (A) and the component (B), 2 the resin component comprising the component (A), the component (B) and the component (C), 3 the resin component comprising the component (A), the component (B), the component (C) and the component (D), 4 the resin component comprising the component (A), the component (B), the component (C) and the component (E), 5 the resin component comprising the component (A), the component (B), the component (C), the component (D) and the component (E), 6 the resin component comprising the component (A), the component (B) and the component (D), 7 the resin component comprising the component (A), the component (B) and the component (E), or 8 the resin component comprising the component (A), the component (B), the component (D) and the component (E). If the content is less than 0.5 parts by weight, the effect of the filler could not be attained. However, if it is more than 350 parts by weight, the dispersibility of the filler in the composition is worsened so that the composition is disadvantageously difficult to shape or mold. Preferably, the content of the inorganic filler is from 5 to 200 parts by weight, more preferably from 10 to 150 parts by weight.

In order to improve the adhesiveness of the inorganic filler to the resin components constituting the composition of the present invention, it is desirable to add, along with the inorganic filler for the component (F), still another component (G) of a polymer which is miscible with or has an affinity for the styrene-based polymer having a syndiotactic configuration for the component (a) of (A) and which has a polar group, to the composition.

The polymer which is miscible with or has an affinity for the component (a) of (A), as referred to herein, is a polymer having therein a polymeric chain that is miscible with or has an affinity for the component (a) of (A). The polymer of this type includes, for example, polymers having, in the main chain, the block chain or the graft chain, any of syndiotactic polystyrene, atactic polystyrene, isotactic polystyrene, styrenic copolymer, polyphenylene ether, polyvinyl methyl ether and the like. The polar group which the polymer shall have is not specifically defined, and may be any and every group capable of improving the adhesiveness of the inorganic filler for the component (F) to the resin components constituting the composition of the invention. Examples of the polar group include residues of acid anhydrides, carboxylic acids, carboxylates, carboxylic acid chlorides, carboxylic acid amides, salts of carboxylic acids, sulfonic acids, sulfonates, sulfonic acid chlorides, sulfonic acid amides, or salts of sulfonic acids; and also epoxy groups, amino groups, imido groups and oxazoline groups.

Specific examples of the component (G) include styrene-maleic anhydride copolymer (SMA), styrene-glycidyl methacrylate copolymer, terminal carboxylic acid-modified polystyrene, terminal epoxy-modified polystyrene, terminal oxazoline-modified polystyrene, terminal amino-modified polystyrene, sulfonated polystyrene, styrene-based ionomer, styrene-methyl methacrylate graft polymer, (styrene-glycidyl methacrylate)-methyl methacrylate graft polymer, acid-modified acryl-styrene graft polymer, (styrene-glycidyl methacrylate)-styrene graft polymer, polybutylene terephthalate-polystyrene graft polymer; as well as modified, styrene-based polymers such as maleic anhydride-modified syndiotactic polystyrene, fumaric acid-modified syndiotactic polystyrene, glycidyl methacrylate-modified syndiotactic polystyrene, and amine-modified syndiotactic polystyrene; and also modified polyphenylene ether-based polymers such as (styrene-maleic anhydride)-polyphenylene ether graft polymer, maleic anhydride-modified polyphenylene ether, fumaric acid-modified polyphenylene ether, glycidyl methacrylate-modified polyphenylene ether, and amine-modified polyphenylene ether. Of these, especially preferred are modified syndiotactic polystyrenes and modified polyphenylene ethers. These can be used either singly or as combined.

The polar group content of the polymer is preferably from 0.01 to 20% by weight, more preferably from 0.05 to 10% by weight. If the content is less than 0.01% by weight, a large amount of the polymer for the component (G) must be added to the composition in order to attain the intended adhesiveness of the inorganic filler to the resin components constituting the composition. Such is unfavorable, since the mechanical properties, the heat resistance and the shapability of the composition are often lowered. If, on the other hand, the content is more than 20% by weight, the miscibility of the polymer with the component (a) of (A) would be lowered and such is also unfavorable.

Modified syndiotactic polystyrenes are preferably used for the component (G), which are referred to below. SPS to be modified is not specifically defined. Any of the polymers as referred to for the component (a) of (A) can be used to obtain modified polymers. In view of the miscibility of the modified polymers with the component (a) of (A), preferably used are styrene homopolymers or styrene-substituted styrene copolymers. For the latter copolymers, the compositional proportions of the constitutive monomers are not specifically defined. However, the content of the substituted styrene units in the copolymers is preferably 50 mol % or less. If it is more than 50 mol %, the miscibility of the modified copolymers with the component (a) of (A) would be lowered and such is unfavorable. The substituted styrene includes, for example, alkylstyrenes such as methylstyrene, ethylstyrene, isopropylstyrene, tert-butylstyrene, and vinylstyrene; halogenostyrenes such as chlorostyrene, bromostyrene, and fluorostyrene; halogenoalkylstyrenes such as chloromethylstyrene; and alkoxystyrenes such as methoxystyrene, and ethoxystyrene. These substituted styrenes can be used either singly or as combined.

As the modifying agent to be used for modifying SPS such as that mentioned hereinabove, employable is a compound having both an ethylenic double bond and a polar group in one molecule. The compound includes, for example, maleic acids such as maleic anhydride, maleic acid, maleates, maleimide and its N-substituted derivatives, and salts of maleic acid; fumaric acids such as fumaric acid, fumarates, and salts of fumaric acid; itaconic acids such as itaconic anhydride, itaconic acid, itaconates, and salts of itaconic acid; acrylic acids such as acrylic acid, acrylates, acrylic acid amides, and salts of acrylic acid; and methacrylic acids such as methacrylic acid, methacrylates, methacrylic acid amides, salts of methacrylic acid, and glycidyl methacrylate. Of these, especially preferred are maleic anhydride, fumaric acid, fumarates and glycidyl methacrylate. The modifying agent can comprise one or more such compounds either singly or as combined.

To obtain modified SPS, for example, SPS such as that mentioned above is reacted with a modifying agent such as that mentioned above, in the presence or absence of a solvent or any other resin. The modification is not specifically defined but can be conducted in accordance with any known methods. For example, employable are a method of melting, kneading and reacting the components at a temperature falling between 150° C. and 350° C., using, for example, a roll mill, a Bambury mixer or an extruder, and a method of reacting the components under heat in a solvent such as benzene, toluene or xylene. In order to promote the reaction, it is effective to add to the reaction system, a radical-generating agent such as benzoyl peroxide, di-t-butyl peroxide, dicumyl peroxide, t-butyl peroxybenzoate, azobisisobutyronitrile, azobisisovaleronitrile, or 2,3-diphenyl-2,3-dimethylbutane. One preferred method for the modification is to melt and knead the component in the presence of such a radical-generating agent. During the modification, if desired, any other resin can be added to the reaction system.

Of the modified SPS thus obtained, especially preferred are maleic anhydride-modified SPS, fumaric acid-modified SPS and fumarate-modified SPS.

Modified polyphenylene ethers are also preferably used for the component (G), which can be obtained by modifying known polyphenylene ethers with a modifying agent. The polyphenylene ethers to be modified are not specifically defined, and any of the polymers as referred to hereinabove for the component (C) can be used. Above all, preferred is poly(2,6-dimethyl-1,4-phenylene ether).

The modifying agents usable for the modification of polyphenylene ethers may be the same as those referred to hereinabove for the modification of SPS. In particular, preferably used are maleic anhydride, fumaric acid, fumarates and glycidyl methacrylate. One or more such modifying agents can be used either singly or as combined. The modification of polyphenylene ethers can be conducted in the same manner as that mentioned hereinabove for the modification of SPS.

Of the modified polyphenylene ethers thus obtained, especially preferred are maleic anhydride-modified polyphenylene ether, fumaric acid-modified polyphenylene ether, and fumarate-modified polyphenylene ether.

The composition of the present invention may comprise one or more polymers having a polar group for the component (G), either singly or as combined. The content of the component (G) to be in the composition shall be from 0.1 to 10 parts by weight relative to 100 parts by weight of 1 the resin component comprising the component (A) and the component (B), 2 the resin component comprising the component (A), the component (B) and the component (C), 3 the resin component comprising the component (A), the component (B), the component (C) and the component (D), 4 the resin component comprising the component (A), the component (B), the component (C) and the component (E), 5 the resin component comprising the component (A), the component (B), the component (C), the component (D) and the component (E), 6 the resin component comprising the component (A), the component (B) and the component (D), 7 the resin component comprising the component (A), the component (B) and the component (E), or 8 the resin component comprising the component (A), the component (B), the component (D) and the component (E). If the content is less than 0.1 parts by weight, the adhesiveness of the inorganic filler to the resin components could not be satisfactorily improved. However, if it is more than 10 parts by weight, the heat resistance and the shapability of the composition would be lowered. In view of the adhesiveness of the inorganic filler to the resin components and of the heat resistance and the shapability of the composition, the content of the component (G) in the composition is preferably from 0.5 to 8 parts by weight, more preferably from 1 to 5 parts by weight.

The resin composition of the present invention may optionally contain, if desired, any known additives, such as a nucleating agent, an antioxidant, a plasticizer, a flame retardant, a flame retardant aid, a release agent, a pigment, carbon black, an antistatic agent, and other rubber components and thermoplastic resins, provided that such additives do not detract from the objects of the present invention.

The nucleating agent includes, for example, metal salts of carboxylic acids, such as aluminium di(p-tert-butylbenzoate); metal salts of phosphoric acid such as sodium methylenebis(2,4-di-t-butylphenol) acid phosphate; and also talc and phthalocyanine derivatives. The antioxidant can be selected from any known phosphorus-containing, phenolic, or sulfur-containing antioxidants. The plasticizer can be selected from any known ones, including, for example, polyethylene glycol, polyamide oligomers, ethylenebis-stearoamide, and polyethylene oligomers.

The flame retardant can be selected from any known ones, including, for example, brominated polymers such as brominated polystyrenes, brominated syndiotactic polystyrenes, and brominated polyphenylene ethers; and brominated aromatic compounds such as brominated diphenylalkanes, and brominated diphenyl ethers. The flame retardant aid can be selected from any known ones, including, for example, antimony compounds such as antimony trioxide. The release agent can be selected from any known ones, including, for example, polyethylene waxes, silicone oils, long-chain carboxylic acids, and metal salts of long-chain carboxylic acids. One or more such additives can be used either singly or as combined.

Specific examples of rubber-like elastic materials which can be added to the composition of the present invention include natural rubber, polybutadiene, polyisoprene, polyisobutylene, neoprene, polysulfide rubber, Thiokol rubber, acrylic rubber, urethane rubber, silicone rubber, epichlorohydrin rubber, and also core/shell type, granular, elastic rubber substances, such as butadiene-acrylonitrile-styrene core/shell rubber (ABS), methyl methacrylate-butadiene-styrene core/shell rubber (MBS), methyl methacrylate-butyl acrylate-styrene core/shell rubber (MAS), octyl acrylate-butadiene-styrene core/shell rubber (MABS), alkyl acrylate-butadiene-acrylonitrile-styrene core/shell rubber (AABS), butadiene-styrene core/shell rubber (SBR), methyl methacrylate-butyl acrylate-siloxane and other siloxane-containing core/shell rubbers, as well as modificates to be obtained by modifying these rubbers. One or more such rubber-like elastic materials can be used either singly or as combined.

Any known thermoplastic resins, for example, as selected from polystyrene resins such as polystyrene, HIPS, ABS, and AS; polyester resins such as polycarbonates, polyarylates, polyethylene terephthalate, and polybutylene terephthalate; polyamide resins such as polyamide 6, polyamide 66, polyamide 46, polyamide 12, and aromatic polyamides; and PPS, can be added to the composition of the present invention. One or more such thermoplastic resins can be used either singly or as combined.

The method for preparing the resin composition of the present invention is not specifically defined. The composition can be prepared by any known methods. For example, the components (a) and (b) of (A), the component (B) and optionally the component (C), the component (D), the component (E), the component (F), the component (G) and other various additives are melted and kneaded, using a ribbon blender, a Henschel mixer, a Bambury mixer, a drum tumbler, a single-screw extruder, a twin-screw extruder, a co-kneader, a multi-screw extruder or the like mixing device, to obtain a resin composition of the present invention.

The resin composition of the present invention can be shaped into articles having excellent physical properties, and the method for shaping it is not defined. For example, the composition can be shaped into various articles through injection molding, into sheets or films through extrusion molding, into containers or trays through extrusion molding combined with thermal molding, into monoaxially or biaxially stretched films or sheets through extrusion molding combined with stretching, or into fibrous articles through spinning.

The present invention is described in more detail hereinunder with reference to the following examples, which, however, are not intended to restrict the scope of the invention. The physical properties of the samples as obtained in the following examples were determined according to the methods mentioned below.

(1) Izod impact strength (with notch)

This was obtained in accordance with JIS K-7110.

(2) Tensile elongation

This was obtained in accordance with JIS K-7113.

(3) Surface layer peeling resistance

Each sample was visually observed and ranked in three, as follows:

A: Very good

B: Good

C: Not good

PRODUCTION EXAMPLE 1

Production of SPS

1.0 liter of pure styrene and 1 mmol of triethyl aluminium were put into a 2-liter reactor and heated at 80° C. Next, 16.5 ml of a pre-mixed catalyst (comprising 90 μmols of pentamethylcyclopentadienyl titanium trimethoxide, 90 μmols of dimethylanilinium tetrakis(pentafluorophenyl)borate, 29.1 mmols of toluene and 1.8 mmols of triisobutyl aluminium) was added thereto, and the monomer was polymerized at 80° C. for 5 hours. After the polymerization, the product was washed plural times with methanol and dried. Thus was obtained 380 g of a polymer.

The weight average molecular weight of the polymer was measured through gel permeation chromatography at 130° C. using a solvent of 1,2,4-trichlorobenzene, to be 300,000. The ratio of weight average molecular weight/number average molecular weight of the polymer was 2.70. It was confirmed that the polymer obtained herein is SPS from the results of the measurement of its melting point and the ¹³ C-NMR analysis thereof.

PRODUCTION EXAMPLE 2

Production of Maleic Anhydride-Modified SPS

One kg of SPS as produced in Production Example 1, 30 g of maleic anhydride and 10 g of a radical-generating agent of cumene hydroxyperoxide were dry-blended, then melted and kneaded through a 30-mm twin-screw extruder at a screw revolution of 200 rpm and at a temperature of 300° C. The strands thus extruded out were cooled and then pelletized to obtain pellets of a maleic anhydride-modified SPS.

To measure the degree of modification of the product, one g of the modified SPS was dissolved in ethylbenzene, then re-precipitated in methanol and collected. The thus-collected polymer was subjected to Soxhlet extraction using methanol and then dried. The degree of modification of the polymer was obtained from the intensity of the carbonyl absorption in its IR spectrum and from its titration, to be 1.04% by weight.

PRODUCTION EXAMPLE 3

Production of Fumaric Acid-Modified Polyphenylene Ether

One kg of polyphenylene ether (having an intrinsic viscosity of 0.45 dl/g in chloroform at 25° C.), 30 g of fumaric acid and 20 g of a radical-generating agent of 2,3-dimethyl-2,3-diphenylbutane (produced by Nippon Oils & Fats Co., Ltd. under the trade name of "Nofmer BC") were dry-blended, then melted and extruded through a 30-mm twin-screw extruder at a screw revolution of 200 rpm and at a temperature of 300° C. The temperature of the resin being extruded was about 330° C. The strands thus extruded out were cooled and then pelletized to obtain pellets of a fumaric acid-modified polyphenylene ether. To measure the degree of modification of the product, one g of the modified polyphenylene ether was dissolved in ethylbenzene, then re-precipitated in methanol and collected. The thus-collected polymer was subjected to Soxhlet extraction using methanol and then dried. The degree of modification of the polymer was obtained from the intensity of the carbonyl absorption in its IR spectrum and from its titration, to be 1.6% by weight.

EXAMPLE 1

50 parts by weight of the syndiotactic polystyrene as prepared in Production Example 1 (having a weight average molecular weight of 300,000 and a ratio of weight average molecular weight/number average molecular weight of 2.70) (this corresponds to the component (a) of (A)), 50 parts by weight of EPM (produced by Japan Synthetic Rubber Co., Ltd. under the trade name of "EP-07P") (this corresponds to the component (b) of (A)), and, relative to 100 parts by weight of the sum of these two, 30 parts by weight of SEBS (produced by Asahi Chemical Industry Co., Ltd. under the trade name of "Tuftec H-1081") (this corresponds to the component (B)), 0.5 parts by weight of a nucleating agent of sodium methylenebis(2,4-di-t-butylphenol) acid phosphate (produced by Asahi Denka Co., Ltd. under the trade name of "NA-11"), 0.1 parts by weight of an antioxidant of (2,6-di-t-butyl-4-methylphenyl)pentaerythritol diphosphite (produced by Asahi Denka Co., Ltd. under the trade name of "PEP-36"), and 0.1 parts by weight of tetrakis(methylene-3-(3',5'-di-t-butyl-4'-hydroxyphenyl)) propionate (produced by Adeka Argus Co., Ltd. under the trade name of "MARK AO 60") were dry-blended in a Henschel mixer, then melted, kneaded and pelletized through a twin-screw extruder. The pellets thus obtained were molded through injection molding to obtain test pieces for an Izod impact test and a tensile elongation test. These test pieces were tested to measure their Izod impact strength and tensile elongation. The results obtained are shown in Table 1 below.

EXAMPLES 2 to 43, COMPARATIVE EXAMPLES 1 to 30

The same process as in Example 1 was repeated except that the components (a) of (A), (b) of (A), (B), (C), (D) and (E) as shown in Table 1 below were used herein. The results obtained are shown in Table 1.

As is known from Table 1, the samples comprising the component (B) having a higher styrene content had much more increased impact strength and elongation than those comprising the component (B) having a lower styrene content. It is also known therefrom that the samples containing the component (C), the component (D) and the component (E) had more increased impact strength and elongation than those not containing them.

EXAMPLE 44

50 parts by weight of the syndiotactic polystyrene as prepared in Production Example 1 (having a weight average molecular weight of 300,000 and a ratio of weight average molecular weight/number average molecular weight of 2.70) (this corresponds to the component (a) of (A)), 50 parts by weight of EPM (produced by Japan Synthetic Rubber Co., Ltd. under the trade name of "EP-07P") (this corresponds to the component (b) of (A)), and, relative to 100 parts by weight of the sum of these two, 30 parts by weight of SEBS (produced by Asahi Chemical Industry Co., Ltd. under the trade name of "Tuftec H-1081") (this corresponds to the component (B)), 0.5 parts by weight of a nucleating agent of sodium methylenebis(2,4-di-t-butylphenol) acid phosphate (produced by Asahi Denka Co., Ltd. under the trade name of "NA-11"), 0.1 parts by weight of an antioxidant of (2,6-di-t-butyl-4-methylphenyl)pentaerythritol diphosphite (produced by Asahi Denka Co., Ltd. under the trade name of "PEP-36"), and 0.1 parts by weight of tetrakis(methylene-3-(3',5'-di-t-butyl-4'-hydroxyphenyl)) propionate (produced by Adeka Argus Co., Ltd. under the trade name of "MARK AO 60") were dry-blended in a Henschel mixer, then melted, kneaded and pelletized through a twin-screw extruder while adding thereto 55.7 parts by weight of glass fibers (produced by Asahi Fiber Glass Co., Ltd. under the trade name of "FT-712"-10 μm/3 mm) (this corresponds to the component (F)).

The pellets thus obtained were molded through injection molding to obtain test pieces for an Izod impact test and a tensile elongation test. These test pieces were tested to measure their Izod impact strength and tensile elongation. The results obtained are shown in Table 2 below.

EXAMPLES 45 to 96, COMPARATIVE EXAMPLES 3 to 70

The same process as in Example 44 was repeated except that the components (a) of (A), (b) of (A), (B), (C), (D), (E), (F) and (G) as shown in Table 2 below were used herein. The results obtained are shown in Table 2.

As is known from Table 2 where all the samples tested contained the inorganic filler of the component (F), the samples comprising the component (B) having a higher styrene content had much more increased impact strength and elongation than those comprising the component (B) having a lower styrene content. It is also known therefrom that the samples containing the component (C), the component (D), the component (E) and the component (G) had more increased impact strength and elongation than those not containing them.

As has been described hereinabove, the impact-resistant, polystyrenic resin composition of the present invention has good shapability and can be formed into articles having high heat resistance, high impact strength, high tensile elongation, and a high modulus of elasticity. Without being limited by the means of shaping it, the composition of the present invention can be shaped into articles having such good physical properties. For example, the impact-resistant, polystyrenic resin composition of the present invention can be molded into various articles through injection molding, into sheets and films through extrusion molding, into containers or trays through extrusion molding combined with thermal molding, into monoaxially or biaxially stretched films or sheets through extrusion molding combined with stretching, or into fibrous articles through spinning.

                                      TABLE 1-1     __________________________________________________________________________     Composition     (a) of A     SPS     Product     (b) of A      B     Obtained in Polyolefin    Miscibility-Improving Agent     Example and           Production      Amount          Styrene                                               Amount     Comparative           Example 1       Added           Content                                               Added     Example           wt. pts.                 Compound                       Grade                           wt. pts.                               Compound                                     Grade wt. %                                               wt. pts.     __________________________________________________________________________     Example 1           50    EPM   EP07P                           50  SEBS  H1081 60  30     Example 2           80    EPM   EP07P                           20  SEBS  H1081 60  20     Example 3           80    EPM   EP07P                           20  SEBS  H1081 60  10     Example 4           80    EPM   EP07P                           20  SEBS  H1081 60  5     Example 5           80    EPM   EP07P                           20  SEBS  H1081 60  5     Example 6           82    EPM   EP07P                           18  SEBS  H1081 60  5     Example 7           89    EPM   EP07P                           11  SEBS  H1081 60  5     Example 8           82    EPM   EP07P                           18  SEBS  H1081 60  5     Example 9           89    EPM   EP07P                           11  SEBS  H1081 60  5     Example 10           82    EPM   EP07P                           18  SEBS  H1081 60  5     Example 11           89    EPM   EP07P                           11  SEBS  H1081 60  5     Example 12           83    EPM   EP07P                           17  SEBS  H1081 60  5     Example 13           83    EPM   EP07P                           17  SEBS  H1081 60  5     Example 14           80    EPM   EP07P                           20  SEPS  Septon 2104                                           65  5     Example 15           80    EPM   EP07P                           20  SEBC  HSB576                                           45  5     Comparative           50    EPM   EP07P                           50  SEBS  H1041 30  30     Example 1     Comparative           80    EPM   EP07P                           20  SEBS  H1041 30  20     Example 2     Comparative           80    EPM   EP07P                           20  SEBS  H1041 30  10     Example 3     __________________________________________________________________________

                                      TABLE 1-2     __________________________________________________________________________     Composition                  D     C            Styrene-Olefin Copolymer with                                      E     PPE          Low Styrene Content Oil, Wax     Example and           0.55 dl/g,         Styrene                                  Amount        Amount     Comparative           CHCl.sub.3, 25° C.                              Content                                  Added         Added     Example           wt. pts.                  Compound                        Grade wt. %                                  wt. pts.                                      Compound                                            Grade                                                wt. pts.     __________________________________________________________________________     Example 1           0      --    --    --  0   --    --  0     Example 2           0      --    --    --  0   --    --  0     Example 3           0      --    --    --  0   --    --  0     Example 4           0      --    --    --  0   --    --  0     Example 5           4      --    --    --  0   --    --  0     Example 6           4      SEBS  Septon 8006                              30  2   --    --  0     Example 7           4      SEBS  Septon 8006                              30  10  --    --  0     Example 8           4      --    --    --  0   paraffin oil                                            PW380                                                2     Example 9           4      --    --    --  0   paraffin oil                                            PW380                                                10     Example 10           4      --    --    --  0   silicone oil                                            SH200                                                2     Example 11           4      --    --    --  0   silicone oil                                            SH200                                                10     Example 12           4      SEBS  Septon 8006                              30  2   paraffin oil                                            PW380                                                2     Example 13           4      SEBS  Septon 8006                              30  2   silicone oil                                            SH200                                                2     Example 14           0      --    --    --  0   --    --  0     Example 15           0      --    --    --  0   --    --  0     Comparative           0      --    --    --  0   --    --  0     Example 1     Comparative           0      --    --    --  0   --    --  0     Example 2     Comparative           0      --    --    --  0   --    --  0     Example 3     __________________________________________________________________________

                                      TABLE 1-3     __________________________________________________________________________                               Physical Properties     Composition                                 Peeling Resistance     F                          Physical Properties                                                 Resistance to     Inorganic Filler          Izod Impact       Peeling of Surface     GF           G            Strength          Layer     Asahi fiber's                  Polar Group-Containing                               (with notches)                                        Tensile Elongation                                                 Visual Observation     Example and           F1712  Polymer      According to JIS K-                                        According to JIS K-                                                 A: Very Good     Comparative           10 μm × 3 mm                        Amount Added                               7110     7113     B: Good     Example           wt. pts.                  Compound                        wt. pts.                               kJ/m.sup.2                                        %        C: Not Good     __________________________________________________________________________     Example 1           0      --    0      22.1     25.9     A     Example 2           0      --    0      13.6     19.4     A     Example 3           0      --    0      10.8     16.8     A     Example 4           0      --    0       9.0     12.0     A     Example 5           0      --    0      11.0     16.0     A     Example 6           0      --    0      12.7     18.2     A     Example 7           0      --    0      15.8     23.4     A     Example 8           0      --    0      13.0     20.6     A     Example 9           0      --    0      15.1     25.5     A     Example 10           0      --    0      12.8     20.0     A     Example 11           0      --    0      15.3     24.9     A     Example 12           0      --    0      16.1     26.3     A     Example 13           0      --    0      15.9     26.8     A     Example 14           0      --    0       9.4     12.1     A     Example 15           0      --    0       8.9     10.9     B     Comparative           0      --    0       7.1      9.8     C     Example 1     Comparative           0      --    0       3.3      3.4     C     Example 2     Comparative           0      --    0       2.4      2.5     C     Example 3     __________________________________________________________________________

                                      TABLE 1-4     __________________________________________________________________________     Composition     (a) of A     SPS     Product     (b) of A       B     Obtained in Polyolefin     Miscibility-Improving Agent     Example and           Production       Amount          Styrene                                                Amount     Comparative           Example 1        Added           Content                                                Added     Example           wt. pts.                 Compound                       Grade                            wt. pts.                                Compound                                      Grade wt. %                                                wt. pts.     __________________________________________________________________________     Comparative           80    EPM   EP07P                            20  SEBS  H1041 30  5     Example 4     Comparative           80    EPM   EP07P                            20  SEBS  H1041 30  5     Example 5     Comparative           80    EPM   EP07P                            20  SEPS  Septon 2002                                            30  5     Example 6     Example 16           50    EPDM  EP181SP                            50  SEBS  H1081 60  30     Example 17           80    EPDM  EP181SP                            20  SEBS  H1081 60  20     Example 18           80    EPDM  EP181SP                            20  SEBS  H1081 60  10     Example 19           80    EPDM  EP181SP                            20  SEBS  H1081 60  5     Example 20           80    EPDM  EP181SP                            20  SEBS  H1081 60  5     Example 21           80    EPDM  EP181SP                            20  SEPS  Septon 2002                                            65  5     Example 22           80    EPDM  EP181SP                            20  SEBC  HSB576                                            45  5     Comparative           50    EPDM  EPl81SP                            50  SEBS  H1041 30  30     Example 7     Comparative           80    EPDM  EP181SP                            20  SEBS  H1041 30  20     Example 8     Comparative           80    EPDM  EP181SP                            20  SEBS  H1041 30  10     Example 9     Comparative           80    EPDM  EP181SP                            20  SEBS  H1041 30  5     Example 10     Comparative           80    EPDM  EP181SP                            20  SEBS  H1041 30  5     Example 11     Comparative           80    EPDM  EP181SP                            20  SEPS  Septon 2002                                            30  5     Example 12     Example 23           50    b-PP  E185G                            50  SEBS  H1081 60  30     Example 24           80    b-PP  E185G                            20  SEBS  H1081 60  20     __________________________________________________________________________

                                      TABLE 1-5     __________________________________________________________________________     Composition                  D     C            Styrene-Olefin Copolymer with                                    E     PPE          Low Styrene Content                                    Oil, Wax     Example and           0.55 dl/g,       Styrene                                Amount        Amount     Comparative           CHCl.sub.3, 25° C.                            Content                                Added         Added     Example           wt. pts.                  Compound                        Grade                            wt. %                                wt. pts.                                    Compound                                          Grade                                              wt. pts.     __________________________________________________________________________     Comparative           0      --    --  --  0   --    --  0     Example 4     Comparative           4      --    --  --  0   --    --  0     Example 5     Comparative           0      --    --  --  0   --    --  0     Example 6     Example 16           0      --    --  --  0   --    --  0     Example 17           0      --    --  --  0   --    --  0     Example 18           0      --    --  --  0   --    --  0     Example 19           0      --    --  --  0   --    --  0     Example 20           4      --    --  --  0   --    --  0     Example 21           0      --    --  --  0   --    --  0     Example 22           0      --    --  --  0   --    --  0     Comparative           0      --    --  --  0   --    --  0     Example 7     Comparative           0      --    --  --  0   --    --  0     Example 8     Comparative           0      --    --  --  0   --    --  0     Example 9     Comparative           0      --    --  --  0   --    --  0     Example 10     Comparative           4      --    --  --  0   --    --  0     Example 11     Comparative           0      --    --  --  0   --    --  0     Example 12     Example 23           0      --    --  --  0   --    --  0     Example 24           0      --    --  --  0   --    --  0     __________________________________________________________________________

                                      TABLE 1-6     __________________________________________________________________________                               Physical Properties     Composition                                 Peeling Resistance     F                         Physical Properties                                                 Resistance to     Inorganic Filler          Izod Impact       Peeling of Surface     GF           G            Strength          Layer     Asahi Fiber's                  Polar Group-Containing                               (with notches)                                        Tensile Elongation                                                 Visual Observation     Example and           F1712  Polymer      According to JIS K-                                        According to JIS K-                                                 A: Very Good     Comparative           10 μm × 3 mm                        Amount Added                               7110     7113     B: Good     Example           wt. pts.                  Compound                        wt. pts.                               kJ/m.sup.2                                        %        C: Not Good     __________________________________________________________________________     Comparative           0      --    0      1.9       1.5     C     Example 4     Comparative           0      --    0      2.3       1.9     C     Example 5     Comparative           0      --    0      1.9       1.8     C     Example 6     Example 16           0      --    0      25.5     27.1     A     Example 17           0      --    0      14.2     20.3     A     Example 18           0      --    0      11.5     17.8     A     Example 19           0      --    0      9.1      13.3     A     Example 20           0      --    0      12.0     17.0     A     Example 21           0      --    0      8.8      13.0     A     Example 22           0      --    0      8.5      11.9     B     Comparative           0      --    0      7.5       9.4     C     Example 7     Comparative           0      --    0      3.2       3.6     C     Example 8     Comparative           0      --    0      2.6       2.3     C     Example 9     Comparative           0      --    0      2.2       1.8     C     Example 10     Comparative           0      --    0      2.4       2.2     C     Example 11     Comparative           0      --    0      1.9       2.0     C     Example 12     Example 23           0      --    0      16.0     16.1     A     Example 24           0      --    0      8.0      11.0     A     __________________________________________________________________________

                                      TABLE 1-7     __________________________________________________________________________     Composition     (a) of A     SPS     Product     (b) of A       B     Obtained in Polyolefin     Miscibility-Improving Agent     Example and           Production       Amount          Styrene                                                Amount     Comparative           Example 1        Added           Content                                                Added     Example           wt. pts.                 Compound                       Grade                            wt. pts.                                Compound                                      Grade wt. %                                                wt. pts.     __________________________________________________________________________     Example 25           80    b-PP  E185G                            20  SEBS  H1081 60  10     Example 26           80    b-PP  E185G                            20  SEBS  H1081 60  5     Example 27           80    b-PP  E185G                            20  SEBS  H1081 60  5     Example 28           80    b-PP  E185G                            20  SEPS  Septon 2104                                            65  5     Example 29           80    b-PP  E185G                            20  SEBC  HBS576                                            45  5     Comparative           50    b-PP  E185G                            50  SEPS  H1041 30  30     Example 13     Comparative           80    b-PP  E185G                            20  SEBS  H1041 30  20     Example 14     Comparative           80    b-PP  E185G                            20  SEBS  H1041 30  10     Example 15     Comparative           80    b-PP  E185G                            20  SEBS  H1041 30  5     Example 16     Comparative           80    b-PP  E185G                            20  SEBS  H1041 30  5     Example 17     Comparative           80    b-PP  E185G                            20  SEPS  Septon 2002                                            30  5     Example 18     Example 30           50    LLDPE LO134N                            50  SEBS  H1081 60  30     Example 31           80    LLDPE LO134N                            20  SEBS  H1081 60  20     Example 32           80    LLDPE LO134N                            20  SEBS  H1081 60  10     Example 33           80    LLDPE LO134N                            20  SEBS  H1081 60  5     Example 34           80    LLDPE LO134N                            20  SEBS  H1081 60  5     Example 35           80    LLDPE LO134N                            20  SEPS  Septon 2104                                            65  5     Example 36           80    LLDPE LO134N                            20  SEBC  HSB576                                            45  5     __________________________________________________________________________

                                      TABLE 1-8     __________________________________________________________________________     Composition                  D           C      Styrene-Olefin Copolymer                                    E     Example           PPE    with Low Styrene Content                                    Oil, Wax     and   0.55 dl/g,       Styrene                                Amount        Amount     Comparative           CHCl.sub.3, 25° C.                            Content                                Added         Added     Example           wt. pts.                  Compound                        Grade                            wt. %                                wt. pts.                                    Compound                                          Grade                                              wt. pts.     __________________________________________________________________________     Example 25           0      --    --  --  0   --    --  0     Example 26           0      --    --  --  0   --    --  0     Example 27           4      --    --  --  0   --    --  0     Example 28           0      --    --  --  0   --    --  0     Example 29           0      --    --  --  0   --    --  0     Comparative           0      --    --  --  0   --    --  0     Example 13     Comparative           0      --    --  --  0   --    --  0     Example 14     Comparative           0      --    --  --  0   --    --  0     Example 15     Comparative           0      --    --  --  0   --    --  0     Example 16     Comparative           4      --    --  --  0   --    --  0     Example 17     Comparative           0      --    --  --  0   --    --  0     Example 18     Example 30           0      --    --  --  0   --    --  0     Example 31           0      --    --  --  0   --    --  0     Example 32           0      --    --  --  0   --    --  0     Example 33           0      --    --  --  0   --    --  0     Example 34           4      --    --  --  0   --    --  0     Example 35           0      --    --  --  0   --    --  0     Example 36           0      --    --  --  0   --    --  0     __________________________________________________________________________

                                      TABLE 1-9     __________________________________________________________________________                            Physical Properties     Composition                         Peeling Resistance     F                      Physical Properties                                         Resistance to           Inorganic Filler                  G         Izod Impact  Peeling of           GF     Polar Group-                            Strength                                   Tensile                                         Surface Layer     Example           Asahi Fiber's                  Containing Polymer                            (with notches)                                   Elongation                                         Visual Observation     and   F1712        Amount                            According to                                   According to                                         A: Very Good     Comparative           10 μm × 3 mm                        Added                            JIS K-7110                                   JIS K-7113                                         B: Good     Example           wt. pts.                  Compound                        wt. pts.                            kJ/m.sup.2                                   %     C: Not Good     __________________________________________________________________________     Example 25           0      --    0   6.8    9.2   A     Example 26           0      --    0   5.9    7.2   A     Example 27           0      --    0   6.5    8.5   A     Example 28           0      --    0   5.8    7.0   A     Example 29           0      --    0   5.5    6.8   B     Comparative           0      --    0   3.1    5.0   C     Example 13     Comparative           0      --    0   2.8    2.4   C     Example 14     Comparative           0      --    0   1.8    2.0   C     Example 15     Comparative           0      --    0   1.3    1.0   C     Example 16     Comparative           0      --    0   1.9    1.5   C     Example 17     Comparative           0      --    0   1.2    1.0   C     Example 18     Example 30           0      --    0   18.5   19.3  A     Example 31           0      --    0   10.4   13.9  A     Example 32           0      --    0   9.2    11.1  A     Example 33           0      --    0   6.4    8.9   A     Example 34           0      --    0   9.3    10.5  A     Example 35           0      --    0   5.9    8.0   A     Example 36           0      --    0   5.9    8.2   B     __________________________________________________________________________

                                      TABLE 1-10     __________________________________________________________________________     Composition     (a) of A           SPS           Product                 (b) of A         B     Example           Obtained in                 Polyolefin       Miscibility-Improving Agent     and   Production         Amount          Styrene                                                  Amount     Comparative           Example 1          Added           Content                                                  Added     Example           wt. pts.                 Compound                       Grade  wt. pts.                                  Compound                                        Grade wt. %                                                  wt. pts.     __________________________________________________________________________     Comparative           50    LLDPE LO134N 50  SEBS  H1041 30  30     Example 19     Comparative           80    LLDPE LO134N 20  SEBS  H1041 30  20     Example 20     Comparative           80    LLDPE LO134N 20  SEBS  H1041 30  10     Example 21     Comparative           80    LLDPE LO134N 20  SEBS  H1041 30   5     Example 22     Comparative           80    LLDPE LO134N 20  SEBS  H1041 30   5     Example 23     Comparative           80    LLDPE LO134N 20  SEPS  Septon 2002                                              30   5     Example 24     Example 37           50    b-PP/EPR                       E185G/EP07P                              25/25                                  SEBS  H1081 60  30     Example 38           80    b-PP/EPR                       E185G/EP07P                              10/10                                  SEBS  H1081 60  20     Example 39           80    b-PP/EPR                       E185G/EP07P                              10/10                                  SEBS  H1081 60  10     Example 40           80    b-PP/EPR                       E185G/EP07P                              10/10                                  SEBS  H1081 60   5     Example 41           80    b-PP/EPR                       E185G/EP07P                              10/10                                  SEPS  H1081 60   5     Example 42           80    b-PP/EPR                       E185G/EP07P                              10/10                                  SEBS  Septon 2104                                              65   5     Example 43           80    b-PP/EPR                       E185G/EP07P                              10/10                                  SEBC  HSB576                                              45   5     Comparative           50    b-PP/EPR                       E185G/EP07P                              25/25                                  SEBS  H1041 30  30     Example 25     Comparative           80    b-PP/EPR                       E185G/EP07P                              10/10                                  SEBS  H1041 30  20     Example 26     Comparative           80    b-PP/EPR                       E185G/EP07P                              10/10                                  SEBS  H1041 30  10     Example 27     Comparative           80    b-PP/EPR                       E185G/EP07P                              10/10                                  SEBS  H1041 30   5     Example 28     Comparative           80    b-PP/EPR                       E185G/EP07P                              10/10                                  SEBS  H1041 30   5     Example 29     Comparative           80    b-PP/EPR                       E185G/EP07P                              10/10                                  SEPS  Septon 2002                                              30   5     Example 30     __________________________________________________________________________

                                      TABLE 1-11     __________________________________________________________________________     Composition                  D           C      Styrene-Olefin Copolymer                                    E     Example           PPE    with Low Styrene Content                                    Oil, Wax     and   0.55 dl/g,       Styrene                                Amount        Amount     Comparative           CHCl.sub.3, 25° C.                            Content                                Added         Added     Example           wt. pts.                  Compound                        Grade                            wt. %                                wt. pts.                                    Compound                                          Grade                                              wt. pts.     __________________________________________________________________________     Comparative           0      --    --  --  0   --    --  0     Example 19     Comparative           0      --    --  --  0   --    --  0     Example 20     Comparative           0      --    --  --  0   --    --  0     Example 21     Comparative           0      --    --  --  0   --    --  0     Example 22     Comparative           4      --    --  --  0   --    --  0     Example 23     Comparative           0      --    --  --  0   --    --  0     Example 24     Example 37           0      --    --  --  0   --    --  0     Example 38           0      --    --  --  0   --    --  0     Example 39           0      --    --  --  0   --    --  0     Example 40           0      --    --  --  0   --    --  0     Example 41           4      --    --  --  0   --    --  0     Example 42           0      --    --  --  0   --    --  0     Example 43           0      --    --  --  0   --    --     Comparative           0      --    --  --  0   --    --  0     Example 25     Comparative           0      --    --  --  0   --    --  0     Example 26     Comparative           0      --    --  --  0   --    --  0     Example 27     Comparative           0      --    --  --  0   --    --  0     Example 28     Comparative           4      --    --  --  0   --    --  0     Example 29     Comparative           0      --    --  --  0   --    --  0     Example 30     __________________________________________________________________________

                                      TABLE 1-12     __________________________________________________________________________                            Physical Properties     Composition                         Peeling Resistance     F                      Physical Properties                                         Resistance to           Inorganic Filler                  G         Izod Impact  Peeling of           GF     Polar Group-                            Strength                                   Tensile                                         Surface Layer     Example           Asahi Fiber's                  Containing Polymer                            (with notches)                                   Elongation                                         Visual Observation     and   F1712        Amount                            According to                                   According to                                         A: Very Good     Comparative           10 μm × 3 mm                        Added                            JIS K-7110                                   JIS K-7113                                         B: Good     Example           wt. pts.                  Compound                        wt. pts.                            kJ/m.sup.2                                   %     C: Not Good     __________________________________________________________________________     Comparative           0      --    0   4.8    3.9   C     Example 19     Comparative           0      --    0   3.3    3.0   C     Example 20     Comparative           0      --    0   2.2    2.5   C     Example 21     Comparative           0      --    0   1.8    2.1   C     Example 22     Comparative           0      --    0   2.3    2.5   C     Example 23     Comparative           0      --    0   1.5    2.7   C     Example 24     Example 37           0      --    0   20.1   23.0  A     Example 38           0      --    0   12.0   16.3  A     Example 39           0      --    0   9.3    13.1  A     Example 40           0      --    0   8.4    11.5  A     Example 41           0      --    0   9.5    13.4  A     Example 42           0      --    0   8.5    10.9  A     Example 43           0      --    0   8.0    9.7   B     Comparative           0      --    0   5.1    5.5   C     Example 25     Comparative           0      --    0   3.0    3.0   C     Example 26     Comparative           0      --    0   2.2    2.2   C     Example 27     Comparative           0      --    0   1.8    1.3   C     Example 28     Comparative           0      --    0   2.3    1.7   C     Example 29     Comparative           0      --    0   1.9    1.5   C     Example 30     __________________________________________________________________________

                                      TABLE 2-1     __________________________________________________________________________     Composition     (a) of A           SPS           Product                 (b) of A         B     Example           Obtained in                 Polyolefin       Miscibility-Improving Agent     and   Production         Amount          Styrene                                                  Amount     Comparative           Example 1          Added           Content                                                  Added     Example           wt. pts.                 Compound                       Grade  wt. pts.                                  Compound                                        Grade wt. %                                                  wt. pts.     __________________________________________________________________________     Example 44           50    EPM   EP07P  50  SEBS  H1081 60  30     Example 45           80    EPM   EP07P  20  SEBS  H1081 60  20     Example 46           80    EPM   EP07P  20  SEBS  H1081 60  10     Example 47           80    EPM   EP07P  20  SEBS  H1081 60   5     Example 48           80    EPM   EP07P  20  SEBS  H1081 60   5     Example 49           80    EPM   EP07P  20  SEBS  H1081 60   5     Example 50           80    EPM   EP07P  20  SEBS  H1081 60   5     Example 51           82    EPM   EP07P  18  SEBS  H1081 60   5     Example 52           89    EPM   EP07P  11  SEBS  H1081 60   5     Example 53           82    EPM   EP07P  18  SEBS  H1081 60   5     Example 54           89    EPM   EP07P  11  SEBS  H1081 60   5     Example 55           82    EPM   EP07P  18  SEBS  H1081 60   5     Example 56           89    EPM   EP07P  11  SEBS  H1081 60   5     Example 57           83    EPM   EP07P  17  SEBS  H1081 60   5     Example 58           83    EPM   EP07P  17  SEBS  H1081 60   5     Example 59           80    EPM   EP07P  20  SEPS  Septon 2104                                              65   5     Example 60           80    EPM   EP07P  20  SEBC  HBS576                                              45   5     Comparative           50    EPM   EP07P  50  SEBS  H1041 30  30     Example 31     __________________________________________________________________________

                                      TABLE 2-2     __________________________________________________________________________     Composition                  D           C      Styrene-Olefin Copolymer                                    E     Example           PPE    with Low Styrene Content                                    Oil, Wax     and   0.55 dl/g,         Styrene                                  Amount        Amount     Comparative           CHCl.sub.3, 25° C.                              Content                                  Added         Added     Example           wt. pts.                  Compound                        Grade wt. %                                  wt. pts.                                      Compound                                            Grade                                                wt. pts.     __________________________________________________________________________     Example 44           0      --    --    --   0  --    --   0     Example 45           0      --    --    --   0  --    --   0     Example 46           0      --    --    --   0  --    --   0     Example 47           0      --    --    --   0  --    --   0     Example 48           0      --    --    --   0  --    --   0     Example 49           0      --    --    --   0  --    --   0     Example 50           4      --    --    --   0  --    --   0     Example 51           4      SEBS  Septon 8006                              30   2  --    --   0     Example 52           4      SEBS  Septon 8006                              30  10  --    --   0     Example 53           4      --    --    --   0  paraffin oil                                            PW380                                                 2     Example 54           4      --    --    --   0  paraffin oil                                            PW380                                                10     Example 55           4      --    --    --   0  silicone oil                                            SH200                                                 2     Example 56           4      --    --    --   0  silicone oil                                            SH200                                                10     Example 57           4      SEBS  Septon 8006                              30   2  paraffin oil                                            PW380                                                 2     Example 58           4      SEBS  Septon 8006                              30   2  silicone oil                                            SH200                                                 2     Example 59           0      --    --    --   0  --    --   0     Example 60           0      --    --    --   0  --    --   0     Comparative           0      --    --    --   0  --    --   0     Example 31     __________________________________________________________________________

                                      TABLE 2-3     __________________________________________________________________________     Composition                Physical Properties     F                          Physical Properties                                             Peeling Resistance           Inorganic Filler     Izod Impact  Resistance to Peeling           GF                   Strength                                       Tensile                                             of Surface Layer     Example           Asahi Fiber's                  G             (with notches)                                       Elongation                                             Visual Observation     and   F1712  Polar Group-Containing Polymer                                According to                                       According to                                             A: Very Good     Comparative           10 μm × 3 mm                         Amount Added                                JIS K-7110                                       JIS K-7113                                             B: Good     Example           wt. pts.                  Compound                         wt. pts.                                kJ/m.sup.2                                       %     C: Not Good     __________________________________________________________________________     Example 44           55.7   Production                         2      14.0  3.5   A                  Example 3     Example 45           51.4   Production                         2      11.5  2.8   A                  Example 3     Example 46           47.1   Production                         2      10.4  2.5   A                  Example 3     Example 47           45.0   --     0      7.3   2.0   A     Example 48           45.0   Production                         2      8.5   2.3   A                  Example 2     Example 49           45.0   Production                         2      9.4   2.4   A                  Example 3     Example 50           46.7   Production                         2      9.9   2.6   A                  Example 3     Example 51           46.7   Production                         2      11.0  2.7   A                  Example 3     Example 52           46.7   Production                         2      12.1  2.9   A                  Example 3     Example 53           46.7   Production                         2      10.9  2.8   A                  Example 3     Example 54           46.7   Production                         2      12.0  2.9   A                  Example 3     Example 55           46.7   Production                         2      11.1  2.8   A                  Example 3     Example 56           46.7   Production                         2      12.3  3.0   A                  Example 3     Example 57           46.7   Production                         2      12.1  2.9   A                  Example 3     Example 58           46.7   Production                         2      12.3  3.0   A                  Example 3     Example 59           45.0   Production                         2      9.5   2.5   A                  Example 3     Example 60           45.0   Production                         2      9.3   2.3   B                  Example 3     Comparative           55.7   Production                         2      7.5   2.5   C     Example 31   Example 3     __________________________________________________________________________

                                      TABLE 2-4     __________________________________________________________________________     Composition           (a) of A           SPS     (b) of A       B     Example           Product Obtained                   Polyolefin     Miscibility-Improving Agent     and   in Production      Amount          Sytrene                                                  Amount     Comparative           Example 1          Added           Content                                                  Added     Example           wt. pts.                   Compound                         Grade                              wt. pts.                                  Compound                                        Grade wt. %                                                  wt. pts.     __________________________________________________________________________     Comparative           80      EPM   EP07P                              20  SEBS  H1041 30  20     Example 32     Comparative           80      EPM   EP07P                              20  SEBS  H1041 30  10     Example 33     Comparative           80      EPM   EP07P                              20  SEBS  H1041 30  5     Example 34     Comparative           80      EPM   EP07P                              20  SEBS  H1041 30  5     Example 35     Comparative           80      EPM   EP07P                              20  SEBS  H1041 30  5     Example 36     Comparative           80      EPM   EP07P                              20  SEBS  H1041 30  5     Example 37     Comparative           80      EPM   EP07P                              20  SEPS  Septon 2002                                              30  5     Example 38     Example 61           50      EPDM  EP181SP                              50  SEBS  H1081 60  30     Example 62           80      EPDM  EP181SP                              20  SEBS  H1081 60  20     Example 63           80      EPDM  EP181SP                              20  SEBS  H1081 60  10     Example 64           80      EPDM  EP181SP                              20  SEBS  H1081 60  5     Example 65           80      EPDM  EP181SP                              20  SEBS  H1081 60  5     Example 66           80      EPDM  EP181SP                              20  SEBS  H1081 60  5     Example 67           80      EPDM  EP181SP                              20  SEBS  H1081 60  5     Example 68           80      EPDM  EP181SP                              20  SEPS  Septon 2104                                              65  5     Example 69           80      EPDM  EP181SP                              20  SEBC  H5B576                                              45  5     Comparative           50      EPDM  EP181SP                              50  SEBS  H1041 30  30     Example 39     Comparative           80      EPDM  EP181SP                              20  SEBS  H1041 30  20     Example 40     __________________________________________________________________________

                                      TABLE 2-5     __________________________________________________________________________     Composition           C      D                      E     Example           PPE    Styrene-Olefin Copolymer with Low Styrene Content                                         Oil, Wax     and   0.55 dl/g,         Styrene                                    Amount         Amount     Comparative           CHCl.sub.3, 25° C.                              Content                                    Added          Added     Example           wt. pts.                  Compound                         Grade                              wt. % wt. pts.                                         Compound                                               Grade                                                   wt. pts.     __________________________________________________________________________     Comparative           0      --     --   --    0    --    --  0     Example 32     Comparative           0      --     --   --    0    --    --  0     Example 33     Comparative           0      --     --   --    0    --    --  0     Example 34     Comparative           0      --     --   --    0    --    --  0     Example 35     Comparative           0      --     --   --    0    --    --  0     Example 36     Comparative           4      --     --   --    0    --    --  0     Example 37     Comparative           0      --     --   --    0    --    --  0     Example 38     Example 61           0      --     --   --    0    --    --  0     Example 62           0      --     --   --    0    --    --  0     Example 63           0      --     --   --    0    --    --  0     Example 64           0      --     --   --    0    --    --  0     Example 65           0      --     --   --    0    --    --  0     Example 66           0      --     --   --    0    --    --  0     Example 67           4      --     --   --    0    --    --  0     Example 68           0      --     --   --    0    --    --  0     Example 69           0      --     --   --    0    --    --  0     Comparative           0      --     --   --    0    --    --  0     Example 39     Comparative           0      --     --   --    0    --    --  0     Example 40     __________________________________________________________________________

                                      TABLE 2-6     __________________________________________________________________________     Composition                Physical Properties     F                          Physical Properties                                             Peeling Resistance           Inorganic Filler     Izod Impact  Resistance to Peeling           GF                   Strength                                       Tensile                                             of Surface Layer     Example           Asahi Fiber's                  G             (with notches)                                       Elongation                                             Visual Observation     and   F1712  Polar Group-Containing Polymer                                According to                                       According to                                             A: Very Good     Comparative           10 μm × 3 mm                         Amount Added                                JIS K-7110                                       JIS K-7113                                             B: Good     Example           wt. pts.                  Compound                         wt. pts.                                kJ/m.sup.2                                       %     C: Not Good     __________________________________________________________________________     Comparative           51.4   Production                         2      6.1    2.0   C     Example 32   Example 3     Comparative           47.1   Production                         2      5.6    1.8   C     Example 33   Example 3     Comparative           45.0   --     0      4.0    1.1   C     Example 34     Comparative           45.0   Production                         2      4.9    1.4   C     Example 35   Example 2     Comparative           45.0   Production                         2      5.2    1.6   C     Example 36   Example 3     Comparative           46.7   Production                         2      6.0    1.8   C     Example 37   Example 3     Comparative           45.0   Production                         2      5.3    1.5   C     Example 38   Example 3     Example 61           55.7   Production                         2      14.2   3.7   A                  Example 3     Example 62           51.4   Production                         2      12.0   3.0   A                  Example 3     Example 63           47.1   Production                         2      10.5   2.7   A                  Example 3     Example 64           45.0   --     0      7.3    1.9   A     Example 65           45.0   Production                         2      8.7    2.2   A                  Example 2     Example 66           45.0   Production                         2      9.8    2.4   A                  Example 3     Example 67           46.7   Production                         2      10.2   2.6   A                  Example 3     Example 68           45.0   Production                         2      9.8    2.4   A                  Example 3     Example 69           45.0   Production                         2      9.3    2.4   B                  Example 3     Comparative           55.7   Production                         2      7.8    2.4   C     Example 39   Example 3     Comparative           51.4   Production                         2      6.5    2.0   C     Example 40   Example 3     __________________________________________________________________________

                                      TABLE 2-7     __________________________________________________________________________     Composition           (a) of A           SPS     (b) of A       B     Example           Product Obtained                   Polyolefin     Miscibility-Improving Agent     and   in Production      Amount          Sytrene                                                  Amount     Comparative           Example 1          Added           Content                                                  Added     Example           wt. pts.                   Compound                         Grade                              wt. pts.                                  Compound                                        Grade wt. %                                                  wt. pts.     __________________________________________________________________________     Comparative           80      EPDM  EP181SP                              20  SEBS  H1041 30  10     Example 41     Comparative           80      EPDM  EP181SP                              20  SEBS  H1041 30  5     Example 42     Comparative           80      EPDM  EP181SP                              20  SEBS  H1041 30  5     Example 43     Comparative           80      EPDM  EP181SP                              20  SEBS  H1041 30  5     Example 44     Comparative           80      EPDM  EP181SP                              20  SEBS  H1041 30  5     Example 45     Comparative           80      EPDM  EP181SP                              20  SEPS  Septon 2002                                              30  5     Example 46     Example 70           50      b-PP  E185G                              50  SEBS  H1081 60  30     Example 71           80      b-PP  E185G                              20  SEBS  H1081 60  20     Example 72           80      b-PP  E185G                              20  SEBS  H1081 60  10     Example 73           80      b-PP  E185G                              20  SEBS  H1081 60  5     Example 74           80      b-PP  E185G                              20  SEBS  H1081 60  5     Example 75           80      b-PP  E185G                              20  SEBS  H1081 60  5     Example 76           80      b-PP  E185G                              20  SEBS  H1081 60  5     Example 77           80      b-PP  E185G                              20  SEPS  Septon 2104                                              65  5     Example 78           80      b-PP  E185G                              20  SEBS  HSB576                                              45  5     Comparative           50      b-PP  E185G                              50  SEBS  H1041 30  30     Example 47     Comparative           80      b-PP  E185G                              20  SEBS  H1041 30  20     Example 48     Comparative           80      b-PP  E185G                              20  SEBS  H1041 30  10     Example 49     __________________________________________________________________________

                                      TABLE 2-8     __________________________________________________________________________     Composition           C      D                      E     Example           PPE    Styrene-Olefin Copolymer with Low Styrene Content                                         Oil, Wax     and   0.55 dl/g,         Styrene                                    Amount         Amount     Comparative           CHCl.sub.3, 25° C.                              Content                                    Added          Added     Example           wt. pts.                  Compound                         Grade                              wt. % wt. pts.                                         Compound                                               Grade                                                   wt. pts.     __________________________________________________________________________     Comparative           0      --     --   --    0    --    --  0     Example 41     Comparative           0      --     --   --    0    --    --  0     Example 42     Comparative           0      --     --   --    0    --    --  0     Example 43     Comparative           0      --     --   --    0    --    --  0     Example 44     Comparative           4      --     --   --    0    --    --  0     Example 45     Comparative           0      --     --   --    0    --    --  0     Example 46     Example 70           0      --     --   --    0    --    --  0     Example 71           0      --     --   --    0    --    --  0     Example 72           0      --     --   --    0    --    --  0     Example 73           0      --     --   --    0    --    --  0     Example 74           0      --     --   --    0    --    --  0     Example 75           0      --     --   --    0    --    --  0     Example 76           4      --     --   --    0    --    --  0     Example 77           0      --     --   --    0    --    --  0     Example 78           0      --     --   --    0    --    --  0     Comparative           0      --     --   --    0    --    --  0     Example 47     Comparative           0      --     --   --    0    --    --  0     Example 48     Comparative           0      --     --   --    0    --    --  0     Example 49     __________________________________________________________________________

                                      TABLE 2-9     __________________________________________________________________________     Composition                Physical Properties     F                          Physical Properties                                             Peeling Resistance           Inorganic Filler     Izod Impact  Resistance to Peeling           GF                   Strength                                       Tensile                                             of Surface Layer     Example           Asahi Fiber's                  G             (with notches)                                       Elongation                                             Visual Observation     and   F1712  Polar Group-Containing Polymer                                According to                                       According to                                             A: Very Good     Comparative           10 μm × 3 mm                         Amount Added                                JIS K-7110                                       JIS K-7113                                             B: Good     Example           wt. pts.                  Compound                         wt. pts.                                kJ/m.sup.2                                       %     C: Not Good     __________________________________________________________________________     Comparative           47.1   Production                         2      5.8    1.8   C     Example 41   Example 3     Comparative           45.0   --     0      3.8    1.0   C     Example 42     Comparative           45.0   Production                         2      4.5    1.3   C     Example 43   Example 2     Comparative           45.0   Production                         2      5.0    1.5   C     Example 44   Example 3     Comparative           46.7   Production     Example 45   Example 3                         2      5.2    1.6   C     Comparative           45.0   Production                         2      4.5    1.1   C     Example 46   Example 3     Example 70           55.7   Production                         2      12.0   2.9   A                  Example 3     Example 71           51.4   Production                         2      9.8    2.3   A                  Example 3     Example 72           47.1   Production                         2      8.5    2.2   A                  Example 3     Example 73           45.0   --     0      5.8    1.5   A     Example 74           45.0   Production                         2      7.1    1.7   A                  Example 2     Example 75           45.0   Production                         2      8.3    1.9   A                  Example 3     Example 76           46.7   Production                         2      8.6    2.1   A                  Example 3     Example 77           45.0   Production                         2      8.2    1.9   A                  Example 3     Example 78           45.0   Production                         2      7.9    1.8   B                  Example 3     Comparative           55.7   Production                         2      5.9    1.8   C     Example 47   Example 3     Comparative           51.4   Production                         2      4.8    1.5   C     Example 48   Example 3     Comparative           47.1   Production                         2      4.0    1.3   C     Example 49   Example 3     __________________________________________________________________________

                                      TABLE 2-10     __________________________________________________________________________     Composition     (a) of A     SPS     Product     (b) of A      B     Obtained in Polyolefin    Miscibilty-Improving Agent     Example and           Production      Amount          Styrene                                               Amount     Comparative           Example 1       Added           Content                                               Added     Example           wt. pts.                 Compound                       Grade                           wt. pts.                               Compound                                     Grade wt. %                                               wt. pts.     __________________________________________________________________________     Comparative           80    b-PP  E185G                           20  SEBS  H1041 30  5     Example 50     Comparative           80    b-PP  E185G                           20  SEBS  H1041 30  5     Example 51     Comparative           80    b-PP  E185G                           20  SEBS  H1041 30  5     Example 52     Comparative           80    b-PP  E185G                           20  SEBS  H1041 30  5     Example 53     Comparative           80    b-PP  E185G                           20  SEPS  Septon 2002                                           30  5     Example 54     Example 79           50    LLDPE L0134N                           50  SEBS  H1081 60  30     Example 80           80    LLDPE L0134N                           20  SEBS  H1081 60  20     Example 81           80    LLDPE L0134N                           20  SEBS  H1081 60  10     Example 82           80    LLDPE L0134N                           20  SEBS  H1081 60  5     Example 83           80    LLDPE L0134N                           20  SEBS  H1081 60  5     Example 84           80    LLDPE L0134N                           20  SEBS  H1081 60  5     Example 85           80    LLDPE L0134N                           20  SEBS  H1081 60  5     Example 86           80    LLDPE L0134N                           20  SEPS  Septon 2104                                           65  5     Example 87           80    LLDPE L0134N                           20  SEBC  HSB576                                           45  5     Comparative           50    LLDPE L0134N                           50  SEBS  H1041 30  30     Example 55     Comparative           80    LLDPE L0134N                           20  SEBS  H1041 30  20     Example 56     Comparative           80    LLDPE L0134N                           20  SEBS  H1041 30  10     Example 57     Comparative           80    LLDPE L0134N                           20  SEBS  H1041 30  5     Example 58     __________________________________________________________________________

                                      TABLE 2-11     __________________________________________________________________________     Composition                  D     C            Styrene-Olefin Copolymer with                                    E     PPE          Low Styrene Content                                    Oil, Wax     Example and           0.55 dl/g,       Styrene                                Amount        Amount     Comparative           CHCl.sub.3, 25° C.                            Content                                Added         Added     Example           wt. pts.                  Compound                        Grade                            wt. %                                wt. pts.                                    Compound                                          Grade                                              wt. pts.     __________________________________________________________________________     Comparative           0      --    --  --  0   --    --  0     Example 50     Comparative           0      --    --  --  0   --    --  0     Example 51     Comparative           0      --    --  --  0   --    --  0     Example 52     Comparative           4      --    --  --  0   --    --  0     Example 53     Comparative           0      --    --  --  0   --    --  0     Example 54     Example 79           0      --    --  --  0   --    --  0     Example 80           0      --    --  --  0   --    --  0     Example 81           0      --    --  --  0   --    --  0     Example 82           0      --    --  --  0   --    --  0     Example 83           0      --    --  --  0   --    --  0     Example 84           0      --    --  --  0   --    --  0     Example 85           4      --    --  --  0   --    --  0     Example 86           0      --    --  --  0   --    --  0     Example 87           0      --    --  --  0   --    --  0     Comparative           0      --    --  --  0   --    --  0     Example 55     Comparative           0      --    --  --  0   --    --  0     Example 56     Comparative           0      --    --  --  0   --    --  0     Example 57     Comparative           0      --    --  --  0   --    --  0     Example 58     __________________________________________________________________________

                                      TABLE 2-12     __________________________________________________________________________                               Physical Properties     Composition                                 Peeling Resistance     F                         Physical Properties                                                 Resistance to     Inorganic Filler          Izod Impact       Peeling of Surface     GF           G            Strength          Layer     Asahi Fiber's                  Polar Group-Containing                               (with notches)                                        Tensile Elongation                                                 Visual Observation     Example and           F1712  Polymer      According to JIS K-                                        According to JIS K-                                                 A: Very Good     Comparative           10 μm × 3 mm                        Amount Added                               7110     7113     B: Good     Example           wt. pts.                  Compound                        wt. pts.                               kJ/m.sup.2                                        %        C: Not Good     __________________________________________________________________________     Comparative           45.0   --    0      2.9      0.9      C     Example 50     Comparative           45.0   Production                        2      3.5      1.0      C     Example 51   Example 2     Comparative           45.0   Production                        2      3.9      1.1      C     Example 52   Example 3     Comparative           46.7   Production                        2      4.1      1.2      C     Example 53   Example 3     Comparative           45.0   Production                        2      3.8      1.0      C     Example 54   Example 3     Example 79           55.7   Production                        2      13.0     2.9      A                  Example 3     Example 80           51.4   Production                        2      10.5     2.4      A                  Example 3     Example 81           47.1   Production                        2      9.4      2.1      A                  Example 3     Example 82           45.0   --    0      6.0      1.5      A     Example 83           45.0   Production                        2      7.5      1.8      A                  Example 2     Example 84           45.0   Production                        2      8.6      1.9      A                  Example 3     Example 85           46.7   Production                        2      9.1      2.1      A                  Example 3     Example 86           45.0   Production                        2      8.7      1.8      A                  Example 3     Example 87           45.0   Production                        2      8.5      2.0      B                  Example 3     Comparative           55.7   Production                        2      6.8      1.8      C     Example 55   Example 3     Comparative           51.4   Production                        2      5.0      1.5      C     Example 56   Example 3     Comparative           47.1   Production                        2      4.6      1.3      C     Example 57   Example 3     Comparative           45.0   --    0      3.0      0.8      C     Example 58     __________________________________________________________________________

                                      TABLE 2-13     __________________________________________________________________________     Composition     (a) of A     SPS     Product     (b) of A         B     Obtained in Polyolefin       Miscibilty-Improving Agent     Example and           Production         Amount          Styrene                                                  Amount     Comparative           Example 1          Added           Content                                                  Added     Example           wt. pts.                 Compound                       Grade  wt. pts.                                  Compound                                        Grade wt. %                                                  wt. pts.     __________________________________________________________________________     Comparative           80    LLDPE L0134N 20  SEBS  H1041 30  5     Example 59     Comparative           80    LLDPE L0134N 20  SEBS  H1041 30  5     Example 60     Comparative           80    LLDPE L0134N 20  SEBS  H1041 30  5     Example 61     Comparative           80    LLDPE L0134N 20  SEPS  Septon 2002                                              30  5     Example 62     Example 88           50    b-PP/EPR                       E185G/EP07P                              25/25                                  SEBS  H1081 60  30     Example 89           80    b-PP/EPR                       E185G/EP07P                              10/10                                  SEBS  H1081 60  20     Example 90           80    b-PP/EPR                       E185G/EP07P                              10/10                                  SEBS  H1081 60  10     Example 91           80    b-PP/EPR                       E185G/EP07P                              10/10                                  SEBS  H1081 60  5     Example 92           80    b-PP/EPR                       E185G/EP07P                              10/10                                  SEBS  H1081 60  5     Example 93           80    b-PP/EPR                       E185G/EP07P                              10/10                                  SEBS  H1081 60  5     Example 94           80    b-PP/EPR                       E185G/EP07P                              10/10                                  SEBS  H1081 60  5     Example 95           80    b-PP/EPR                       E185G/EP07P                              10/10                                  SEPS  Septon 2104                                              65  5     Example 96           80    b-PP/EPR                       E185G/EP07P                              10/10                                  SEBC  HBS576                                              45  5     Comparative           50    b-PP/EPR                       E185G/EP07P                              25/25                                  SEBS  H1041 30  30     Example 63     Comparative           80    b-PP/EPR                       E185G/EP07P                              10/10                                  SEBS  H1041 30  20     Example 64     Comparative           80    b-PP/EPR                       E185G/EP07P                              10/10                                  SEBS  H1041 30  10     Example 65     Comparative           80    b-PP/EPR                       E185G/EP07P                              10/10                                  SEBS  H1041 30  5     Example 66     Comparative           80    b-PP/EPR                       E185G/EP07P                              10/10                                  SEBS  H1041 30  5     Example 67     Comparative           80    b-PP/EPR                       E185G/EP07P                              10/10                                  SEBS  H1041 30  5     Example 68     Comparative           80    b-PP/EPR                       E185G/EP07P                              10/10                                  SEBS  H1041 30  5     Example 69     Comparative           80    b-PP/EPR                       E185G/EP07P                              10/10                                  SEPS  Septon 2002                                              30  5     Example 70     __________________________________________________________________________

                                      TABLE 2-14     __________________________________________________________________________     Composition                  D     C            Styrene-Olefin Copolymer with                                    E     PPE          Low Styrene Content                                    Oil, Wax     Example and           0.55 dl/g,       Styrene                                Amount        Amount     Comparative           CHCl.sub.3, 25° C.                            Content                                Added         Added     Example           wt. pts.                  Compound                        Grade                            wt. %                                wt. pts.                                    Compound                                          Grade                                              wt. pts.     __________________________________________________________________________     Comparative           0      --    --  --  0   --    --  0     Example 59     Comparative           0      --    --  --  0   --    --  0     Example 60     Comparative           4      --    --  --  0   --    --  0     Example 61     Comparative           0      --    --  --  0   --    --  0     Example 62     Example 88           0      --    --  --  0   --    --  0     Example 89           0      --    --  --  0   --    --  0     Example 90           0      --    --  --  0   --    --  0     Example 91           0      --    --  --  0   --    --  0     Example 92           0      --    --  --  0   --    --  0     Example 93           0      --    --  --  0   --    --  0     Example 94           4      --    --  --  0   --    --  0     Example 95           0      --    --  --  0   --    --  0     Example 96           0      --    --  --  0   --    --  0     Comparative           0      --    --  --  0   --    --  0     Example 63     Comparative           0      --    --  --  0   --    --  0     Example 64     Comparative           0      --    --  --  0   --    --  0     Example 65     Comparative           0      --    --  --  0   --    --  0     Example 66     Comparative           0      --    --  --  0   --    --  0     Example 67     Comparative           0      --    --  --  0   --    --  0     Example 68     Comparative           4      --    --  --  0   --    --  0     Example 69     Comparative           0      --    --  --  0   --    --  0     Example 70     __________________________________________________________________________

                                      TABLE 2-15     __________________________________________________________________________                               Physical Properties     Composition                                 Peeling Resistance     F                         Physical Properties                                                 Resistance to     Inorganic Filler          Izod Impact       Peeling of Surface     GF           G            Strength          Layer     Asahi Fiber's                  Polar Group-Containing                               (with notches)                                        Tensile Elongation                                                 Visual Observation     Example and           F1712  Polymer      According to JIS K-                                        According to JIS K-                                                 A: Very Good     Comparative           10 μm × 3 mm                        Amount Added                               7110     7113     B: Good     Example           wt. pts.                  Compound                        wt. pts.                               kJ/m.sup.2                                        %        C: Not Good     __________________________________________________________________________     Comparative           45.0   Production                        2      3.6      1.1      C     Example 59   Example 2     Comparative           45.0   Production                        2      3.9      1.3      C     Example 60   Example 3     Comparative           46.7   Production                        2      4.2      1.4      C     Example 61   Example 3     Comparative           45.0   Production                        2      4.0      1.2      C     Example 62   Example 3     Example 88           55.7   Production                        2      13.3     3.1      A                  Example 3     Example 89           51.4   Production                        2      10.9     2.5      A                  Example 3     Example 90           47.1   Production                        2      9.8      2.3      A                  Example 3     Example 91           45.0   --    0      6.7      1.7      A     Example 92           45.0   Production                        2      8.0      1.9      A                  Example 2     Example 93           45.0   Production                        2      9.1      2.1      A                  Example 3     Example 94           46.7   Production                        2      9.5      2.3      A                  Example 3     Example 95           45.0   Production                        2      9.3      2.0      A                  Example 3     Example 96           45.0   Production                        2      9.0      2.2      B                  Example 3     Comparative           55.7   Production                        2      7.2      2.1      C     Example 63   Example 3     Comparative           51.4   Production                        2      5.7      1.7      C     Example 64   Example 3     Comparative           47.1   Production                        2      5.0      1.5      C     Example 65   Example 3     Comparative           45.0   --    0      3.3      0.9      C     Example 66     Comparative           45.0   Production                        2      4.0      1.2      C     Example 67   Example 2     Comparative           45.0   Production                        2      4.3      1.3      C     Example 68   Example 3     Comparative           46.7   Production                        2      4.5      1.5      C     Example 69   Example 3     Comparative           45.0   Production                        2      4.3      1.4      C     Example 70   Example 3     __________________________________________________________________________      Notes:      SPS: Obtained in Production Example 1.      EP07P: EPR produced by Japan Synthetic Rubber Co., Ltd.      EP181SP: EPDM produced by Japan Synthetic Rubber Co., Ltd.      E185G: bPP produced by Idemitsu Petrochemical Co., Ltd.      L0134N: LLDPE produced by Idemitsu Petrochemical Co., Ltd.      Tuftec H1081: SEBS produced by Asahi Chemical Industry Co., Ltd.      Tuftec H1041: SEBS produced by Asahi Chemical Industry Co., Ltd.      Septon 2104: SEPS produced by Kuraray Co., Ltd.      Septon 2002: SEPS produced by Kuraray Co., Ltd.      Septon 8006: SEBS produced by Kuraray Co., Ltd.      Dynaron HBS576: SEBC produced by Japan Synthetic Rubber Co., Ltd.      PPE: Poly(2,6dimethyl-1,4-phenylene ether) having an intrinsic viscosity      of 0.55 dl/g in chloroform at 25° C.      PW 380: Paraffin oil produced by Idemitsu Kosan Co., Ltd.      SH 200: Silicone oil produced by Toray Dow Corning Silicone Co., Ltd.      FT 712: Glass fiber having a length of 3 mm and a diameter of 10 μm,      produced by Asahi Fiber Glass Co., Ltd.

As has been described in detail hereinabove, the syndiotactic polystyrenic resin composition of the present invention can be formed into articles having good heat resistance, a high modulus of elasticity and greatly improved toughness. In addition, the articles are advantageous in that their surface layers are hardly peeled.

Therefore, the resin composition of the present invention is favorably used in forming various materials for industrial use, for example, electric and electronic materials (e.g., connectors, substrates for printed circuits), industrial construction materials, car parts (e.g., connectors to be mounted on cars, wheel caps, cylinder head covers), household appliances, various machine parts, pipes, sheets, trays, films, etc.

While the invention has been described in detail and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope thereof. 

What is claimed is:
 1. A syndiotactic, polystyrenic resin composition comprising resin components of (A) 100 parts by weight of a component composed of (a) from 10 to 98% by weight of a styrene-based polymer having a syndiotactic configuration and (b) from 2 to 90% by weight of a polyolefin, and (B) from 0.5 to 50 parts by weight of a block or graft styrene-olefin copolymer having a styrene content of from 50 to 85% by weight.
 2. The syndiotactic, polystyrenic resin composition as claimed in claim 1, which further contains (E) from 0 to 200 parts by weight, relative to 100 parts by weight of the component (b) of (A), of mineral oils.
 3. The syndiotactic, polystyrenic resin composition as claimed in claim 1, which further contains (F) from 0.5 to 350 parts by weight, relative to 100 parts by weight of the resin components, of an inorganic filler wherein said inorganic filler is a glass fiber.
 4. The syndiotactic, polystyrenic resin composition as claimed in any one of claims 1, wherein the component (B) comprises at least one selected from the group consisting of hydrogenated styrene-butadiene-styrene block copolymers, hydrogenated styrene-isoprene-styrene block copolymers, hydrogenated styrene-butadiene block copolymers and hydrogenated styrene-isoprene block copolymers.
 5. The syndiotactic, polystyrenic resin composition as claimed in any one of claims 1, wherein the component (b) of (A) comprises at least one selected from ethylene-propylene copolymers, ethylene-propylene-diene copolymers, polypropylenes and polyethylenes. 